| 摘要 |
PURPOSE:To prevent a motor from generating heat and to reduce an unnecessary torque and energy by altering a reference voltage in response to the times of slow accelerating or decelerating, and driving at a constant speed. CONSTITUTION:Slow acceleration phase signal information is called from a memory 22 at the time of starting a motor 1, and a phase current decision signal is output from a motor controller 19. In this case, a reference voltage Vp is set to a high value. When a slow acceleration is finished, the phase current decision signal is altered, and a constant speed drive is performed. Since the current at the time of driving at a constant speed is lower than a phase current at the time of slow acceleration, more power consumption than necessary is not performed. Then, when the motor 1 is stopped, a slow deceleration current decision signal is called from the memory 22, and the slow deceleration is conducted. The phase current at the time of the slow deceleration is similar to the value at the time of the slow acceleration. |
